Except it does say that, actually:
The map demonstrates the significance of the defensive positions chosen by the British. The 'Confidence' line broadly followed the Turkish railway network where it exited the Taurus Mountains, while the 'Sprawl' land forces would hold the key points further west. To transport large forces through the Taurus at anything other than a snail's pace, the Germans would need to use the railways, the crucial portions of which would be held by the British. No British ground forces would operate north of the Taurus. It was Turkish suspicion of this limited commitment, to the strategically important areas in southern Turkey, which Hugessen had reported in December 1941.97|
By March - and in the wake of a renewed Axis offensive in North Africa which had retaken Cyrenaica - even these plans had been drastically scaled back. The 'Sprawl' air forces would still assist the Turks, but the supporting brigade groups would only provide cover for the RAF, and would not engage the Germans, whose anticipated invasion force was four armoured and six motorised divisions. The forces available to the Ninth Army fell short of those required for 'Confidence,' but could be deployed to support the 'Sprawl' force by occupying a less-ambitious line, demarcated "Defraud.' This ran significantly to the south of 'Confidence,' but still incorporated strategic points on the railway network, at Osmaniye and Gaziantep. Rather than holding these successfully against the Germans, the British now anticipated their destruction during an inevitable Allied retreat, significantly delaying the Axis forces' passage towards Syria and Iraq.
Besides the above, the map (taken from British planning documents) states the Germans would advance along the railways and directly depicts which railways they would use in their advance. Along with that, it also depicts the proposed British line(s) in the Taurus Mountains and what railways could be used to support them logistically.